This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 9 |
| 3 | 30 |
| 4 | 70 |
| 5 | 135 |
| 6 | 231 |
| 7 | 364 |
| 8 | 540 |
| 9 | 765 |
| 10 | 1045 |
| 11 | 1386 |
| 12 | 1794 |
| 13 | 2275 |
| 14 | 2835 |
| 15 | 3480 |
| 16 | 4216 |
| 17 | 5049 |
| 18 | 5985 |
| 19 | 7030 |
| 20 | 8190 |
| 21 | 9471 |
| 22 | 10879 |
| 23 | 12420 |
| 24 | 14100 |
| 25 | 15925 |
| 26 | 17901 |
| 27 | 20034 |
| 28 | 22330 |
| 29 | 24795 |
| 30 | 27435 |
| 31 | 30256 |
| 32 | 33264 |
| 33 | 36465 |
| 34 | 39865 |
| 35 | 43470 |
| 36 | 47286 |
| 37 | 51319 |
| 38 | 55575 |
| 39 | 60060 |
| 40 | 64780 |